Telephone manufacturers implement the Bluetooth standard in different ways. As implementation of the Bluetooth standard differs between mobile devices and may change during the life of a product, there may be limitations in the vehicle for which the BMW Group is not responsible.
The software, hardware and configuration of the mobile device (e.g. size of phonebook, power-saving mode), operating status of the mobile device (e.g. battery charge, length of operation, degree of usage), network and SIM card will all have an influence on their compatibility. For this reason, sporadic impairment of functions cannot be ruled out, even in the case of mobile devices which otherwise function reliably.